Hosea southwiok



H. soUTHwlcK.

Grinding MMI.

No. 19,521. Patented March 2, 1858.

umana n ummm HOSEA SOUTHWIGK, OF LITTLE COOLY, PENNSYLVANIA.

GRINDINGr-MILL Specification of Letters Patent No. 19,521, dated March2, 1858.

To all whom t may concern.'

Be it known that I, HosEA SOUTHWICK, of Little Cooly, in the county ofCrawford, in the State of Pennsylvania, have invented a new and ImprovedMode of Grinding Flour, Meal, &c.; and I do hereby declare thatthefollowing is a full and exact description thereof, reference being hadto the accompanying drawings and to the letters of reference thereon.

The nature of my invention consists in grinding with a stone runningperpendicular fitting in a stone concave thereby grinding faster andwith less power.

To enable others to make and use my invention I will proceed to describeits construction and operation.

Figure 1 represents the runner and may be two feetmore or less indiameter and from eight to twelve inches in thickness and made perfectlyround and balanced. The grinding face is on the out edge on which thereare shallow furrows one inch wide and from three to five inches apartand may be made in the shape of a V or circular U the ends standingforward.

Fig. 2 is a stone concave made to span one third of the runner one inchwider than the runner is t-hick and from 5 to 8 inches through the lowerend reaching to the bottom center of the stone. The upper end is cut outl inches narrower than the runner (see section of Fig. 2) running outabout 6 in. from upper end. There may be from 3 to 5 narrow furrows nearto the upper end as shown in Fig. 2.

Fig. 3 is a strong plank one to be on each .side of the concave fastenedtogether by bolts.

Fig. 4 is a roller on which the concave stands. The ends of the rollerare mortised and work on cogsby means of a lever connected by a setscrew in the forward part of the mill. On the roller where the sides ofthe concave rest the bearings are turned inch from the center so thatwhen the roller is moved by the lever the concave will be raised andbrought forward at the same The upper end of the concave rests time.

against a roller similar to the lower one exr cepting the cogs in placeof which it has journals. It is moved with a lever and screw as theother, and is dropped in so as to be easily taken out if required sothat the concave may be laid back when needed.

Fig. 5 is the main shaft 4L ft. long of wrought or cast iron running on12 inch friction rollers. The stone is secured to this shaft 6 in. fromthe end. The pulley by which the power is 'applied is near the otherend. This pulley should be about 5 in. thick and two inches less thanthe stone in diameter.

Fig. 6 is a cast iron roller the same width of the stone running looseon the shaft A kept to its place by collars on the shaft. It is placedas near as possible to the concave. The ends of this shaft to be squaredand fitted into 3 inch round zinc boXes Je; inch from center of saidboxes one end to pass through to receive a lever which is moved by a setscrew to regulate the distance of the roller from the runner. This neednot be used for only coarse grain. The runner may be inclosed by a curbor fastened to the sides of the concave. The grain to be fed in by aspout made nearly as wide as the runner. The stone may be of the samequality as stones used in other mills. The speed should be about 500revolutions per minute. I do not claim the friction rollers on which themain shaft runs.

That I do claim as my invention and de sire to secure by Letters Patentis- The mode of grinding all kinds of grain into Hour and meal with aperpendicular stone fitting into a stone concave and a counter stone orcrusher on the top of the runner near the upper end of the concave saidcounter stone or Crusher is to crush the grain before it drops betweenthe runner and the concave thereby grinding faster and with much lesspower than common mills.

HO SEA SOUTHWICK.

Witnesses:

G. S. STEWART, C. M. BRAWLEY.

